The inhibition
efficiency of ethanolic extract of different parts of Capparis decidua (Ker) in acidic medium has been
evaluated by mass loss and thermometric methods. Values of inhibition efficiency obtained from the two methods are in good agreement and are dependent upon the concentration of inhibitor and acid.
Aluminium being various corrosive agents subject an industrially important metal to
corrosion in service, of which aqueous acids are most harmful. The corrosion of aluminium and its alloys in acidic solution has been studied. The effect of
nitrogen containing heterocyclic compounds on the dissolution of aluminium has also been evaluated. Organic compounds containing nitrogen have been found to function as very effective corrosion inhibitors. The efficiency of these compounds as corrosion
inhibitors can be attributed to the number of mobile electron pair present, the orbital character of free electrons and electron density around the nitrogen atoms. In the present investigation the inhibitive effect have been evaluated of ethanolic extract of fruit, stem
bark and root bark of Capparis decidua. The extracts of Capparis decidua work as green inhibitor, which are nontoxic and biodegradable. Ker is commonly used in the Indian system of medicine. Its stem bark, root bark, fruit, seeds, young shoots and even buds are endowed with medicinal properties. The seeds are cooling, laxative, refrigerant, leaves and young shoots are purgative, stem bark is cooling astringent and fruit is laxative and digestive. Because of the toxic nature and high cost of some chemicals currently in use it is necessary to develop environmental
acceptable and less expensive inhibitors. Natural product can be considered as a good source for this purpose. To reduce the corrosion problem in environment inhibitive effects of various naturally occurring substances like Datura stramonium2, Calotropis gigantea, Capparis decidua3, Prosopis juliflora4 have been evaluated as effective corrosion inhibitors.
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